ZINUS 12 Inch Green Tea Cooling Memory Foam Mattress [New Version], King, Fiberglass Free, Medium Firmness, Cooling Gel Foam, Certified Safe Foams & Fabric, Mattress in A Box
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Extended holiday returns
Returnable until Jan 31, 2026 Learn more
Returnable until Jan 31, 2026 Learn more
This item's return window has been extended for the holiday season: Returnable until Jan 31, 2026
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
To initiate a return, please visit our Returns Center.
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Availability:
Only 4 left in stock, order soon!
Arrives
Dec 4 – Dec 5
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Size: King
Style: 12"
Pattern Name: Green Tea Cooling (Small Box)
Features
- COOLER SLEEP AND A CLEANER PLANET Topped with soothing gel memory foam, this mattress is designed to help keep you cool and comfortable throughout the night, and ships in a new smaller box to support a reduced carbon footprint
- REJUVENATING SUPPORT Pressure-relieving memory foam conforms to the shape of your body to enhance circulation and decrease stress on your joints, and is infused with cooling gel for ultimate temperature regulation
- ALL NIGHT FRESHNESS - The all-natural green tea and purified charcoal infusions work together to help keep your mattress fresh for many nights to come
- CERTIFIED SAFE MATERIALS Crafted from high-quality CertiPUR-US certified foam and wrapped with an OEKO-TEX certified mattress cover all produced without the use of harmful chemicals for safer, healthier sleep
- WORRY-FREE WARRANTY A 10-year limited warranty is included with the mattress; please allow 2472 hours for your mattress to expand to its original shape
Description
This cooling gel-infused memory foam mattress is specially designed to help regulate your body temperature throughout the night, making it a great solution for hot sleepers. Layers of soft and supportive foam mold to your body to relieve sore muscles and achy joints as you snooze. All high-quality foam in this mattress is CertiPUR-US® certified to ensure there are no harmful chemicals where you rest—giving you peace of mind you can sleep on.
Brand: Zinus
Size: King
Product Dimensions: 80"L x 76"W x 12"Th
Top Style: Tight Top
Cover Material: Polyester
Number of Layers: 3
Fill Material: Gel Memory Foam
Weight Limit: 500 Pounds
Special Feature: Breathable, Pressure Relief
Color: White
Item Weight: 78 pounds
Product Dimensions: 80 x 76 x 12 inches
Item model number: ZU-MFGN1YZI-12K
Age Range Description: Adult
Date First Available: October 13, 2023
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Dec 4 – Dec 5
Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Similar Products
Top Amazon Reviews
Size: Queen
Style: 12"
Pattern Name: Green Tea Cooling (Small Box)
I have had the same mattress for the past 5 years, and it came to me already five years old. I admit, as a night owl I didn't consider that I might have a more challenging time going to sleep at night because my bed was uncomfortable. I got a mattress topper for Christmas, and it helped a bit, but I didn't notice a huge difference. When my friend mentioned she'd bought a new mattress under similar circumstances, I began searching for a new one immediately. As a student, I obviously cannot really afford to drop $1000 on those fancy mattresses people kept recommending. The Zinus mattress caught my eye because A) it was recommended on just about every site I looked for "High-quality, affordable mattresses," and B) I have a 2-year-old Zinus bedframe that I love and has served me so well. I've had the mattress for a few days now and although it arrived a bit too firm for my liking, it has since softened. Granted, I spent some time walking on it to break it down faster. I expect the mattress to become even softer as it continues to modify to my body shape. Mattress preferences are extremely subjective, but for a 120-pound female, this mattress feels heavenly to me. I've been so excited about how it feels that I'm spending a lot of time in my bed and trying to go to bed earlier. I'm biased toward the brand but I will modify this review if I notice the quality of the mattress degrading. It’s been six months since I purchased this mattress and it has been such a game changer. It’s so comfy that it’s sent me down a rabbit hole of getting new, equally as comfy bedding to accommodate it. My bed is my favorite place in the world right now. I think for me this seemed like one of those too good to be true things because a mattress in a box is a weird concept for sure, but I’ve not had a single issue with it in the time I’ve had it. To anybody on the fence, there’s so many mattresses out there that purport to be one thing or another or the best in the business and the truth is it’s so subjective. But I don’t think the expense of a product has to equate to its quality. The $1000 mattresses aren’t necessarily better sometimes. This mattress was affordable and has proven itself. I’m very happy with the purchase
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Reviewed in the United States on March 26, 2024 by Shelby
Size: Twin
Style: 10"
Pattern Name: Green Tea Cooling (Small Box)
I’ve been using the ZINUS 10" Green Tea Cooling Memory Foam Mattress (new fiberglass-free version) for a few weeks now, and I’m really impressed. It arrived quickly, was well-packaged, and expanded fully within a day. There was a very light scent at first, but nothing unpleasant—and it faded quickly. The comfort level is just right for me—supportive but with enough softness to relieve pressure on my shoulders and hips (I’m mostly a side sleeper). It conforms nicely without feeling like I’m sinking in too much. I also appreciate the cooling layer—it doesn't sleep hot like other memory foam mattresses I’ve tried. One of the biggest reasons I chose this model was the fact that it’s fiberglass-free. That gave me real peace of mind, especially since I’ve read horror stories about older models with fiberglass. No issues here at all. Overall, this mattress delivers great value for the price. If you're looking for something comfortable, budget-friendly, and safer than older foam mattresses, this is a solid choice. Would definitely recommend!
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Reviewed in the United States on October 17, 2025 by L J
Size: Queen
Style: 12"
Pattern Name: Green Tea Cooling (Original Box)
UPDATE 16 Months: We still love our beds. We have two of them. Even as heavy people we don't have any spots that have weird sink holes. My back and body have never felt better thanks to these mattresses. I suggest these to all of my friends, family, and clients and everyone has been thankful for the recommendation. You are getting a great quality bed that is safe to sleep on for very little money. Sleep is super important at our house and I wish we would have gotten these earlier. We cosleep with our children and these mattresses are perfect for that. Our infant has slept in this bed since about 20 minutes after birth with no issues. Our daughter loves it and doesn't like going to sleep at grandmas anymore because her bed isn't comfortable enough. UPDATE 6 Months: I love this bed still. We have two. I can't imagine life without them. They are wonderful. I sleep so well and I am 42 weeks along and 120lbs overweight. They are both 12 inches now and don't have any weird spots where we lay. First review:This is only day two with the mattress. I will update later for a better review. I am pregnant and was in the worst pain. My back and hips hurt so bad. I couldn't sleep. Walking hurt. Sitting hurt. After one night on this mattress I felt so much better. Now after two days I feel like I have a brand new body. I even rode comfortably in the car for two hours today without pain and I usually can't go that long. This is a great mattress for people with back and hip pain(mine is mostly from being overweight). It did smell a bit funny when we opened it. I put a nice mattress cover on it and it hides the smell pretty well. It isn't as bad smelling as a memory foam pillow I bought once. Now two days later the smell is way less when I move the cover. We bought two of these mattresses. One in each room. So far I would absolutely suggest this mattress. It still isn't 12 inches but it says that it may take a week when its cold. I will update once the smell is gone and the mattress is 12 inches so you know how long they both took. oh! I sleep on my back, stomach, and both sides and all are comfortable. Its not too firm or too soft. It came out of the box perfect with no rips, tears, or stains. Update day 11. I still love them. We bought two and they aren't the same. One inflated more and is firmer. The other is still around 9/10 inches and it is much softer. I like it better. The smell is still there when I take the covers off but it isn't bad. If I left them uncovered for a day it would really help but I can't risk it with kids and dogs in the house. I wake up each morning feeling like I have someone else's body. I wish I would have bought this bed years ago. The edges are lower on all sides of both beds, if you sleep close to the edge you will sort of be rolled towards the ground so try to stay a few inches in. Its really cold here right now so it may just need a bit more time to fully inflate. Personally I hope the one stays where it is at because its much softer.
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Reviewed in the United States on November 11, 2017 by Sara K